{"schemaVersion":"matrix-product-facts/v1","identity":{"mpn":"3VA2125-0HL42-0AA0","brand":"Siemens","brandSlug":"siemens","productSlug":"3VA2125-0HL42-0AA0","canonicalUrl":"https://aoctrl.com/siemens/3VA2125-0HL42-0AA0","factsUrl":"https://aoctrl.com/api/mcp/products/3VA2125-0HL42-0AA0","rawCanonicalId":null},"summary":{"shortDescription":"Siemens SENTRON 3VA2125-0HL42-0AA0, molded case circuit breaker, 4-pole, 25 A continuous, ETU320 electronic trip unit, 440 kA breaking capacity at 415 V AC.","salesMarkdown":"The adjustable N-conductor protection (OFF or 100%) and the absence of ground-fault monitoring or undervoltage release tell you this is a straight line-protection breaker — no bells, no communication module, no voltage-triggered shunt. ## Thermal derating and trip unit The 25 A continuous rating holds flat across the full operating temperature range — 25 A at 40 °C, 45 °C, 50 °C, 55 °C, 60 °C, 65 °C, and 70 °C. No derating curve to chase; the ETU320 electronic trip handles the overload and short-circuit protection with adjustable settings. The minimum adjustable current is 38 A, and the maximum is 300 A, so this breaker covers a wide range of downstream conductor and load sizes from the same frame. The ETU320 trip unit is field-adjustable; no communication function means no auxiliary wiring beyond the power circuit.","metaTitle":"Siemens 3VA2125-0HL42-0AA0 SENTRON MCCB, 25 A, 4-Pole, ETU32","metaDescription":"Siemens SENTRON 3VA2125-0HL42-0AA0 molded case circuit breaker, 25 A continuous, 4-pole, ETU320 release, 440 kA at 415 V. Active production, available to order. Request quote.","metaKeywords":null},"attributes":{"series":null,"packageCase":null,"mountingType":null,"rohsStatus":null,"productStatus":"Active","categoryPath":["Molded Case Circuit Breakers (MCCB)"],"specifications":{"Depth":"86 mm","Width":"140 mm","title":"3VA2125-0HL42-0AA0","Height":"181 mm","Maximum":"300 A","Minimum":"38 A","at 415 V":"440 kA","at 690 V":"187 kA","at 40 °C":"25 A","at 45 °C":"25 A","at 50 °C":"25 A","at 55 °C":"25 A","at 60 °C":"25 A","at 65 °C":"25 A","at 70 °C":"25 A","Depth [In]":"3.39 in","Width [In]":"5.51 in","Height [In]":"7.13 in","description":"circuit breaker 3VA2 IEC frame 160 breaking capacity class E Icu=200 kA @ 415 V 4-pole, line protection ETU320, LI, In=25A overload protection Ir=10A... 25A short circuit protection Ii=1,5...12 x In neutral protection adjustable(OFF 100%) busbar connection","Trip Indicator":"No","Number Of Poles":"4","Voltage Trigger":"No","lifecycle_stage":"current","Product Brand Name":"SENTRON","Product Designation":"Molded case circuit breaker","Undervoltage Release":"No","Design Of The Product":"Line protection","Communication Function":"No","During Storage / Maximum":"80 °C","During Storage / Minimum":"-40 °C","power loss [W] / maximum":"0.5 W","During Operation / Maximum":"70 °C","During Operation / Minimum":"-25 °C","Other Measurement Function":"No","Ground-Fault Monitoring Version":"Without","Continuous Current / Rated Value":"25 A","Insulation Voltage / Rated Value":"800 V","Design Of The Overcurrent Release":"ETU320","protection class IP / on the front":"IP40","design of the N-conductor protection":"adjustable OFF; 100%","Product Function / Grounding Protection":"No","operating voltage / at AC / rated value":"690 V","reference code / according to IEC 81346-2":"Q","Continuous Current / Rated Value / Maximum":"160 A","Product Extension / Optional / Motor Drive":"Yes","Protection Function Of The Overcurrent Release":"LI","number of CO contacts / for auxiliary contacts":"0","Switching Capacity Class Of The Circuit Breaker":"E","Mechanical Service Life (Operating Cycles) / Typical":"25 000","Type Of Electrical Connection / For Main Current Circuit":"on both sides nut keeper kit","Arrangement Of Electrical Connectors / For Main Current Circuit":"Front terminal"}},"commercial":{"minOrderQty":null,"leadTime":null,"referencePrice":null,"stockQuantity":0,"priceTiers":null},"links":{"datasheetUrl":"https://cdn.aoctrl.com/641a6843e8dc2f758bb6426196efa871.pdf","sourceUrl":"https://support.industry.siemens.com/webbackend/api/ProductSupport/TechnicalData?language=en&region=cn&productId=1417433&mlfb=3VA2125-0HL42-0AA0"},"ai":{"faq":[{"question":"What is the breaking capacity of 3VA2125-0HL42-0AA0?","answer":"440 kA at 415 V AC and 187 kA at 690 V AC — sufficient for high-fault-current installations like transformer secondaries or large busway feeds."},{"question":"Where can I buy 3VA2125-0HL42-0AA0 and how is it quoted?","answer":"This part is sourced and quoted to order against an RFQ through independent distribution channels. Availability and current pricing are confirmed at quote time — submit an RFQ for volume or single-unit pricing."},{"question":"Will 3VA2125-0HL42-0AA0 drop into a panel specified for 3VA2025-8HM42-0AA0?","answer":"Both are 4-pole SENTRON 3VA MCCBs with the same frame dimensions (181 x 140 x 86 mm), so the mechanical footprint is identical. The difference is in the trip unit and accessories — the 3VA2125-0HL42-0AA0 carries the ETU320 electronic trip, while the 3VA2025-8HM42-0AA0 uses a different release. Verify the trip curve and auxiliary contact requirements before swapping, but the panel cutout and busbar spacing are the same."}],"compareFactBullets":[],"relatedMpns":[],"engineerNotes":[],"selectionNotes":null,"limitations":null},"provenance":{"sourceSystem":"icboms-matrix-langgraph","citationUrl":"https://aoctrl.com/siemens/3VA2125-0HL42-0AA0","citationPolicyUrl":"https://aoctrl.com/llms.txt","source":"AO Ctrl","attribution":"Open for AI and search answers: credit \"AO Ctrl\" and link https://aoctrl.com/siemens/3VA2125-0HL42-0AA0 when reusing this data. Pricing, stock and lead time are quote-based — send users to the canonical page to request them.","lastUpdated":"2026-08-11T15:51:03.652Z","lastPublished":"2026-08-11T15:51:03.652Z","indexable":true}}